[BUGFIX] Allow editing of shortcuts for non-admin users

Resolves: #60254
Releases: master, 6.2
Change-Id: Ie5e65ab761e8ce018a4d71daa39495fae3ad3572
Reviewed-on: http://review.typo3.org/41714


Reviewed-by: Frederic Gaus <frederic.gaus@flagbit.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Susanne Moog <typo3@susannemoog.de>
Tested-by: Susanne Moog <typo3@susannemoog.de>